21120112000087 has 2 divisors, whose sum is σ = 21120112000088. Its totient is φ = 21120112000086.

The previous prime is 21120112000027. The next prime is 21120112000133. The reversal of 21120112000087 is 78000021102112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120112000087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120112000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560056000043 + 10560056000044.

It is an arithmetic number, because the mean of its divisors is an integer number (10560056000044).

Almost surely, 2^{21120112000087} is an apocalyptic number.

21120112000087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120112000087 is an equidigital number, since it uses as much as digits as its factorization.

21120112000087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 21120112000087 its reverse (78000021102112), we get a palindrome (99120133102199).

The spelling of 21120112000087 in words is "twenty-one trillion, one hundred twenty billion, one hundred twelve million, eighty-seven", and thus it is an aban number.